http://bit.ly/maelt_ske_mu_reg
Students and staff of Masaryk University register for the Sketch Engine here:
https://ske.fi.muni.cz/register/email_constraint/
As it says on the form, The e-mail address must end with .muni.cz. Your password will be e-mailed to this address.
The point of having your own account within the Sketch Engine is so you can customise various aspects of the site, and so that you can create your own corpora. Registered users can share their own corpora with each other.
Passwords
Your confirmation email contains a randomly generated password. Change it to something memorable. It should go without saying that when you change your password to something memorable, it should be memorable.
In the worst case, you can click on Lost Password and get another randomly generated one that you will need to change to something even more memorable.